Drive to Tuner will full tank of E85 tune

I have an LS3 with a Vortech that I'm trying to get tuned on E85. (DSX FF kit and DSX Aux pump) It has already been tuned on 93. Can I modify my current tune so that it knows E85 is in the tank, but not add the additional timing or performance aspects of the tune? Just need to drive it 8 miles to the tuner on E85. No boost of course.

Is that possible? If anyone is willing to help I can upload my tune from my laptop.

Well that's easy enough... So I planned to run it empty at the pump, fill with the E that I will be using most often (closest to my house), flash the tune, then take it in for a tune.
Should I also switch my wideband to read lamba? If I cant switch to lamba, what should it read running E to indicate fueling is correct?